Creamy Mashed Cauliflower Colcannon

cauliflower florets (about 1 large head)

kosher salt, divided

cup Almond Breeze Almondmilk Original Unsweetened

extra-virgin olive oil or melted and cooled coconut oil, divided

nutritional yeast*

black pepper

leeks, white and pale-green parts only, thinly sliced

garlic, minced

finely chopped kale leaves (about 1 bunch; be sure to remove the tough stems)

medium green onions, finely chopped

Optional: vegan buttery spread, such as Earth Balance, for serving (or butter if the recipe being vegan is not a concern)